[SLE-16263][SLE-16359] An easy way to check or (re)configure the installer settings
See #89626 for the feature information.
We can automate functionality to cover basics:
- Test if proxy functionality works
- Test if Expert Console allows to execute simple command and list repositories
- If Repos functionality stays in SLES, we should test if we can Add/Edit/Remove repos
- Test if Network Devices dialog can be opened (we have this functionality available in the installer already, so we should cover it separately and just validate that it's available in scope of this ticket)